Knob for vacuum cleaner



FIG. 1 is a perspective view of a knob for vacuum cleaner, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is another perspective view thereof shown in an environment of use.

The broken lines illustrating portions of the knob for vacuum cleaner form no part of the claimed design. 

CLAIM The ornamental design for a knob for vacuum cleaner, as shown and described. 